// Inspired by https://github.com/Inndy/vue-clipboard2
const Clipboard = require( 'clipboard' )
if ( !Clipboard ) {
  throw new Error( 'you should npm install `clipboard` --save at first ' )
}

export default {
  bind( el, binding ) {
    if ( binding.arg === 'success' ) {
      el._v_clipboard_success = binding.value
    } else if ( binding.arg === 'error' ) {
      el._v_clipboard_error = binding.value
    } else {
      const clipboard = new Clipboard( el, {
        text() { return binding.value },
        action() { return binding.arg === 'cut' ? 'cut' : 'copy' }
      } )
      clipboard.on( 'success', e => {
        const callback = el._v_clipboard_success
        callback && callback(e) // eslint-disable-line
      } )
      clipboard.on( 'error', e => {
        const callback = el._v_clipboard_error
        callback && callback(e) // eslint-disable-line
      } )
      el._v_clipboard = clipboard
    }
  },
  update( el, binding ) {
    if ( binding.arg === 'success' ) {
      el._v_clipboard_success = binding.value
    } else if ( binding.arg === 'error' ) {
      el._v_clipboard_error = binding.value
    } else {
      el._v_clipboard.text = function() { return binding.value }
      el._v_clipboard.action = function() { return binding.arg === 'cut' ? 'cut' : 'copy' }
    }
  },
  unbind( el, binding ) {
    if ( binding.arg === 'success' ) {
      delete el._v_clipboard_success
    } else if ( binding.arg === 'error' ) {
      delete el._v_clipboard_error
    } else {
      el._v_clipboard.destroy()
      delete el._v_clipboard
    }
  }
}
